CVE-2025-0618
📋 TL;DR
This vulnerability allows a malicious actor to cause a persistent denial of service in FireEye EDR agents by sending a specially crafted tamper protection event. The attack prevents all future tamper protection events from being processed, even after system reboot. Organizations using FireEye HX EDR are affected.
💻 Affected Systems
- FireEye Endpoint Security (HX)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete loss of tamper protection functionality across all FireEye HX agents, allowing attackers to disable security controls without detection and potentially enabling further attacks.
Likely Case
Targeted DoS attacks against specific FireEye HX agents to disable tamper protection, creating security blind spots in affected systems.
If Mitigated
Limited impact if network segmentation prevents external access to HX service and internal threat actors are monitored.
🎯 Exploit Status
Exploitation requires sending a specially crafted event to the HX service endpoint, which is typically network-accessible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Trellix advisory for specific fixed versions
Vendor Advisory: https://thrive.trellix.com/s/article/000014456
Restart Required: Yes
Instructions:
1. Review Trellix advisory for specific fixed versions. 2. Update FireEye HX agents to the patched version. 3. Restart HX services to apply the fix.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to HX service endpoints to only trusted management systems
Firewall Rules
allImplement firewall rules to block unauthorized access to HX service ports
🧯 If You Can't Patch
- Implement strict network segmentation to isolate HX service endpoints
- Monitor for unusual tamper protection event patterns and failed processing
🔍 How to Verify
Check if Vulnerable:
Check FireEye HX agent version against patched versions in Trellix advisoryCheck Version:
On Windows: Check HX agent version in Control Panel or via HX console. On Linux: Check HX agent service version.Verify Fix Applied:
Verify agent version is updated to patched version and test tamper protection functionality📡 Detection & Monitoring
Log Indicators:
- Failed tamper protection event processing
- HX service exceptions related to event handling
- Unusual network connections to HX service ports
Network Indicators:
- Unusual traffic patterns to HX service endpoints
- Multiple malformed event packets to HX ports
SIEM Query:
source="fireeye_hx" AND (event_type="tamper_protection" AND status="failed") OR (message="exception" AND process="hx_service")